| 摘要 |
A discharge port array is having first discharge port groups each having eight discharge ports (sixteen discharge ports in total) including an end discharge port, and a second discharge port group having the remaining discharge ports located at an intermediate portion between the first discharge port groups. As opposite to the discharge port array, a discharge port array has the second discharge port groups located at both end portions of the array and the first discharge port group located at an intermediate portion between the second discharge port groups. Ink droplets each having a volume of 5.0 pl are discharged from the discharge ports of the first discharge port groups, while ink droplets each having a volume of 2.5 pl are discharged from the discharge ports of the second discharge port group. With this configuration, generation of a stripe can be prevented upon solid printing.
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